The last hundred years has witnessed an explosion in the number of art movements, styles and schools that have emerged, with contemporary artists breaking traditional boundaries again and again. Modern styles are here defined by the experts. In more than 350 essays, the most popular movements Surrealism, Expressionism, Pop art and Art Deco are discussed alongside recent experiments in new media video art, land art and environmental art. The origins and artistic aims of such intriguing movements as the Donkey's Tail, the Kitchen Sink school and the Stupid group are fully covered. It is an ideal way to explore both the major and minor artistic movements of the 20th century.